import java.util.Scanner;
public class Fifth{
	public static void main(String[] args){
	Scanner sc =new Scanner(System.in);
	System.out.println("Please enter the length of the square:");
	int n=sc.nextInt();
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n-i;j++){
		System.out.print(" ");
		}
		for(int j=1;j<=2*i-1;j++){
			if(j==1||j==2*i-1){
			System.out.print("*");
			}else{
			System.out.print(" ");
			}
		}
	System.out.println();
	}
	for(int i=n-1;i>=1;i--){
		for(int j=1;j<=n-i;j++){
		System.out.print(" ");
		}
		for(int j=1;j<=2*i-1;j++){
			if(j==1||j==2*i-1){
			System.out.print("*");
			}else{
			System.out.print(" ");
			}
		}
	System.out.println();
	}
	}
}